Device to form a cloth selvage with tucked-in filling ends on a weaving machine

ABSTRACT

This invention relates to a device to form a cloth selvage with tucked-in filling ends on a weaving machine with filling yarn supply packages situated outside of the warp shed, a filling insertion member pulling the yarn from the supply package and inserting it into the shed in the form of a loop starting from the selvage and a cutting device being controlled synchronously with the filling insertion cycle for cutting the filling at a distance from the selvage inside of the warp shed. The cutting device itself is characterized by a first cutter half mounted fixed for rotation on an oscillating shaft borne parallel to the fell of the cloth, whereas the second cutter half of said cutting device is arranged in the same way but pivotable in relation to the first cutter half.

Inventor Maurice Joseph Wasyleviez Bruyeres, France Appl. No. 13,579 Filed Feb. 24, 1970 Patented Oct. 5, 1971 Assignee Georg Fischer AG.

Brugg, Switzerland Priority Feb. 28, 1969 France 16226 DEVICE TO FORM A CLOTH SELVAGE WITH TUCKED-IN FILLING ENDS ON A WEAVING MACHINE 3 Claims, 10 Drawing Figs.

US. Cl 139/122 R, 139/127, l39/302 Int. Cl D036 47/40 Field of Search 139/122 R,

[56] References Cited UNITED STATES PATENTS 3,347,282 10/1967 Kokkinis 139/122 3,384,127 5/1968 Ballbe 139/122 3,494,384 2/1970 Amengual et al 139/122 3,530,902 9/1970 Stingl l39/122 Primary Examiner-Henry S. J audon Attorney-Rodney C. Southworth ABSTRACT: This invention relates to a device to form a cloth selvage with tucked-in filling ends on a weaving machine with filling yarn supply packages situated outside of the warp shed, a filling insertion member pulling the yarn from the supply package and inserting it into the shed in the form of a loop starting from the selvage and a cutting device being controlled synchronously with the filling insertion cycle for cutting the filling at a distance from the selvage inside of the warp shed. The cutting device itself is characterized by a first cutter half mounted fixed for rotation on an oscillating shaft borne parallel to the fell of the cloth, whereas the second cutter half of said cutting device is arranged in the same way but pivotable in relation to the first cutter half.

PATENTEUUBI 519m 34610292 SHEET 1 [IF 3 INVENTUR.

Maurice J. Was yleviez A rm/F/vfr DEVICE TO FORM A CLOTH SELVAGE WITH TUCKED- IN FILLING ENDS ON A WEAVING MACHINE BACKGROUND OF THE INVENTION With conventional weaving machines of this sort the cloth has an open selvage at the side of the filling insertion which has to be locked. This can be done by means of a leno bound selvage. Other devices are known to form a locked selvage by means of tucked-in filling ends which are beaten up together with the subsequent pick. A disadvantage of such devices is the fact that after cutting the filling yarn, the free filling end is not always parallel to the fell of the cloth and can be displaced and looped or curled upon crossing of the shed.

It is an object of the invention to create a device to form a perfect, locked cloth selvage of regular width at the side of the filling insertion.

SUMMARY OF THE INVENTION According to the invention a desired result is achieved by means of a depressing member arranged at that cutter half which is on the side of the filling insertion and being actuated together with the cutter half during the cutting process, to depress the shed in the range between the cloth selvage and the cutting point of the filling to trap and hold the tucked cut end so it will not become displaced.

The drawings show by way of example one configuration of the object of the invention, whereby:

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of the function of the conventional weaving machine to which the invention can be applied.

FIG. 2 is a view similar to FIG. 1, however, using the device of the invention.

FIG. 3 is a view from above onto the inventive device.

FIG. 4 is a view of the device from the right-hand side in FIG. 3 with the cutting device open.

FIG. 5 is a view as in FIG. 4, but with the cutting device closed.

FIGS. 6, 7 and 8 are side views of the cutting device in three different positions of operation.

FIG. 9 is a section along the line IXIX in FIG. 6.

FIG. is a schematic view to a larger scale showing the function of the comb on pressing the shed together.

DESCRIPTION OF THE PREFERRED EMBODIMENT FIG. 1 shows schematically the hitherto known function on a shuttleless weaving machine. The filling yarn 1 supplied from a supply package 2 is inserted into a shed 3 by means of an insertion member, such as, e.g. a rapier 4 with filling carrier 6 moving to and fro, parallel to the fell of the cloth 5.

The filling carrier 6 takes the filling 7 in the form of a loop (hairpin) up to the approximate middle point of the cloth width. At that point the filling is transferred to or taken over by a pulling out or withdrawing carrier 8 on a rapier 9 which is moving synchronously with the rapier 4 in known manner. Flexible steel tapes to guide and actuate the filling carriers may also be used instead of rapiers 4 and 9.

After transfer of the loop from carrier 6 to carrier 8, the filling 7 is cut from the preceding pick to pull out the cut end of loop 7 along the fell of the cloth 5. All these movements are synchronized with the opening and closing of the warp shed and with the beating up of the pick. These processes are commonly known in the field.

On known weaving machines the filling 7 is cut at point 10 FIG. 1, outside of a number of false selvage ends or auxiliary selvage ends, being provided at approximately I cm. from the cloth selvage to form a false or auxiliary selvage. The cloth is then locked with a leno or binder selvage l2. Thereupon the filling is cut in the gap with no warp ends between the auxiliary selvage l1 and the cloth selvage 12, to separate the auxiliary selvage from the usable cloth.

According to the subject invention a tucked and locked selvage is made from the beginning without using any false selvage or binder ends. The filling is cut at point 13 (FIG. 2) which is located inside the warp shed 3 in such a way that a tucked-in free filling end 14 is obtained which is beaten up along the fell of the cloth 5. After cutting, the free filling end 14 is trapped and pushed against the fell of the cloth 5, whereby on a limited width at theedge, one of the two warp tapes 3b of the shed 3 is pressed towards the other warp tape 3a and maintained in that relationship until the whole shed closes thereby finally locking the filling end 14 in the cloth, FIG. 10.

Cutting, trapping, pushing up and holding fast of the free filling end 14 can be effected by a cutting device 15 as shown in FIGS. 3 to 9. The general arrangement and the function are shown in FIG. 2. The device 15 consists substantially of two cutter halves l6 and 17 arranged on a driving shaft l8 which is positioned parallel to the fell of the cloth 5.

By rotation of the shaft 18 controlled by means, not shown, e.g. by a cam-controlled rack and pinion drive, the cutting device is actuated synchronously with the filling insertion cycle of the weaving machine. The first cutter half 16 which during the working process remains in its position, is rotatively borne on the shaft 18 and is called fixed cutter half." It is stopped in its working position by an adjustable stop 19 onits hub which is acting together with a fixed stop 20 at the loom, FIGS. 6 to 8. The other, or second cutter half 17, which is called movable cutter half, is fixed on the shaft 18 by means of the screw 21. The terms fixed" and movable" here relates to the time of cutting.

The first cutter half 16 ends in a beak 22 standing at an angle of approximately to the warp shed 3, and in a warp end separator 23 having the shape of a ski point, at the frontof which is arranged a cutter blade 24 with a trapezoidal mouth or notch 25. This blade 24 is operated to plunge into the shed 3 between the warp ends separated by the warp end separator 23, down through the lower warp tape 30 in such a way and to such a point that the filling part 7a, FIG. 7, of the loop 7 which is still together with or continues from the preceding pick, gets into the notch 25 when the device 15 is lowered from its lifted rest position as shown in FIG. 6, into the waiting position, FIG. 7. The other part of the filling loop remains outside of the device 15 and of the notch 25. The first cutter half I6 is at that time stopped against the stop 20 in a rest position.

The movable or second cutter half 17 will now move in relation to the fixed or first cutter half 16 like the blades of a pair of scissors as the shaft 18 continues its rotation. The cutter half 17 has a beak 26 which also carries a warp separator 27, FIG. 4. It is provided with a cutter blade 28 functioning to cut the filling part 7a of the filling loop 7 in collaboration with the cutter blade 24 of the other cutter half 16 to leave the free filling end 14 as shown in FIG. 8.

At the top of the beak 26, the second cutter half 17 is provided with a rotatable shaft 29 which can move in a slot 30 of the first cutter half 16, and which on the other end carries a rotatable ring 31. A tensioning spring 32 acting together with the ring 31, resting with its one end against a face 33 of the ring 31 and being fixed at the other end by means of a screw 34 onto the cutter half 16, tends to maintain the rest position, FIG. 2, between the two cutter halves.

At the ring 31 a comb 35 is fixed, standing parallel to the fell of the cloth, and the lower, free end of which is bent toward the fell of the cloth 5. Teeth 36 arranged at the lower end of the comb 35 are designed to plunge between the warp ends of the upper warp tape 3b and to guide the filling end 14 toward the fell of the cloth 5. On this movement of the comb 35, the upper ends of the upper tape 31: are depressed by the horizontal portions between the teeth along the whole width of the comb, against the tape 30, thereby locking the filling end 14 between the teeth 36 of the comb 35 and the fell of the cloth on the one side and between the warp ends 3a and 3b on the other, side, until the final crossing of the shed takes place. This is equivalent to a local early crossing or closing of the shed for the filling end 14 which is then finally locked by the subsequent normal closing of the shed. The required movements of the comb 35 are controlled on the one side by a cam 37 provided on the comb 35 on the side of the fell of the cloth and which is sliding on a roller 38 borne on a stud 39 arranged on the first cutter half 16, FIGS. 6 and 7, and on the other side by a cam 40 fixed on the comb 35 on the side opposite the fell of the cloth 5 and which is acting together with a roller 41 borne on a stud 42 arranged on the second cutter half 17. A traction spring 43 tensioned between the screw 34 and the ring 31 secures the adequate engagement of the cam 37 on the roller 38.

The advantage of the described device as compared with conventional push up motions is the fact that the free filling end 14 which is to be beaten up together with the subsequent pick, is perfectly locked and held in position over its whole length, i.e. from the selvage to the cutting point 13 in the shed, by the comb 35 and the early closing of the shed, respectively, until the subsequent shed crossing and beat-up take place.

This disclosure of a preferred embodiment of the invention is to be interpreted as illustrative of one form which the invention may take and modifications will readily occur to those skilled in the art. The invention is not to be restricted except by the scope of the appended claims wherein the novel features desired to be protected by Letters Patent are set forth:

l claim:

1. A device to form a cloth selvage with tucked-in filling ends on a weaving machine with filling yarn supply packages situated outside of the warp shed, a filling insertion member pulling the yarn from the supply package and inserting it into the shed in the form of a loop starting from the selvage and a cutting device controlled synchronously with the filling insertion cycle for cutting the filling at a distance from the selvage inside of the warp shed, the first cutter half of which is mounted for rotation on an oscillating shaft borne parallel to the fell of the cloth, whereas the second cutter half of the said cutting device is arranged to pivot coaxially with the first cutter half, characterized in that, on the filling insertion side of the cutting device (15) a depressing member (35) is arranged on the one cutter half (17) and has cam and follower means acting between it and the other cutter half by which said depressing member (35) is actuated together with said cutter half to press the cut end of filling toward the fell and also by means of the stroke of the supporting cutter half downwardly, to press a band of the top warp threads downwardly over the said end of filling in that area between the edge of the cloth and the cutting point at which said filling end is severed.

2. A device as defined in claim 1, further characterized in that, the depressing member to press together the shed (3) is pivotably borne on the second cutter half (17) under spring tension (32) and has the shape ofa comb (35), the teeth (36) of which pass between the warp ends (3b) of the shed (3) when the cutter is moved to operative position.

3. A device as defined in claim 2, further characterized in that, the comb (35) is provided with earns (37, 40) acting together with followers (38, 41) to give the comb its swinging movement toward the fell of the cloth (5), said movement being coordinated with a vertical movement given by the cutting movement of the second cutter half (17). 

1. A device to form a cloth selvage with tucked-in filling ends on a weaving machine with filling yarn supply packages situated outside of the warp shed, a filling insertion member pulling the yarn from the supply package and inserting it into the shed in the form of a loop starting from the selvage and a cutting device controlled synchronously with the filling insertion cycle for cutting the filling at a distance from the selvage inside of the warp shed, the first cutter half of which is mounted for rotation on an oscillating shaft borne parallel to the fell of the cloth, whereas the second cutter half of the said cutting device is arranged to pivot coaxially with the first cutter half, characterized in that, on the filling insertion side of the cutting device (15) a depressing member (35) is arranged on the one cutter half (17) and has cam and follower means acting between it and the other cutter half by which said depressing member (35) is actuated together with said cutter half to press the cut end of filling toward the fell and also by means of the stroke of the supporting cutter half downwardly, to press a band of the top warp threads downwardly over the said end of filling in that area between the edge of the cloth and the cutting point at which said filling end is severed.
 2. A device as defined in claim 1, further characterized in that, the depressing member to press together the shed (3) is pivotably borne on the second cutter half (17) under spring tension (32) and has the shape of a comb (35), the teeth (36) of which pass between the warp ends (3b) of the shed (3) when the cutter is moved to operative position.
 3. A device as defined in claim 2, further characterized in that, the comb (35) is provided with cams (37, 40) acting together with followers (38, 41) to give the comb its swinging movement toward the fell of the cloth (5), said movement being coordinated with a vertical movement given by the cutting movement of the second cutter half (17). 